Mobile support for electric drills



Dec. 24, 1968 M. 1.. WABER 3,417,949

MOBILE SUPPORT FOR ELECTRIC DRILLS Filed Oct. 28, 1966 2 Sheets-Sheet 1 i2 L INVENi'OR.

' Mom/Ls L. Weber ATTORNEY Dec. 24, 1968 M. L. WABER MOBILE SUPPORT FOR ELECTRIC DRILL-S 2 SheetsSheet 2 w 7 a m 3 2 azl I i H H' m ll 4/; L J 59 ATTORNEY United States Patent 3,417,949 MOBILE SUPPORT FOR ELECTRIC DRILLS Morris L. Waber, Kalamazoo, Mich., assignor to Waber Tool & Engineering Co., Kalamazoo, Mich., a partnership Filed Oct. 28, 1966, Ser. No. 590,379 4 Claims. (Cl. 248-13) This invention relates to improvements in mobile support for electric drills. The principal objects of the invention are:

First, to provide a mobile support for an electric drill in which a wheeled carriage having a vertically adjustable frame or support is provided with a housing connected to the support in ofl-set overhanging relation to the carriage, with a bracket attachable to an electric drill angularly and longitudinally adjustably mounted on the housing, so that adjustment of the bracket will feed the bit of a drill to and from a work piece, the support having a chain connectable around the work to form an abutment for the force feeding the bit into the work.

Second, to provide a wheeled automotive screw jack base with an adjustable support for a manually operable electric drill so that the drill may be supported in various vertically and angularly adjusted positions on the base and fed to the work by a manually operated feed screw.

Third, to provide a support and feed mechanism for a manually operable drill which eliminates the labor of holding the drill, and permits the drill to be advanced to the work by an easily adjustable feed screw.

Other objects and advantages of the invention will be apparent from a consideration of the following description and claims. The drawings of which there are two sheets illustrate a highly practical form of the drill support and its connections to a commercial and normally manually operable electric drill.

FIGURE 1 is a side elevational view of the support and drill of the invention in operative relation to a work piece.

FIGURE 2 is a fragmentary top plan view of the drill holding and feeding portion of the support.

FIGURE 3 is a fragmentary cross sectional view taken along the plane of the line 33 in FIGURE 2.

FIGURE 4 is a fragmentary cross sectional view taken along the plane of the line 44 in FIGURE 2.

FIGURE 5 is a fragmentary enlarged cross sectional view taken along the plane of the line 55 in FIGURE 1.

FIGURE 1 illustrates parts of a mobile or wheeled automotive jack 1 having a base 2 mounted on rollers 3 and casters 4. An upright pedestal 5 on the base form a support and guide for a carriage generally indicated at 6. The carriage has side plates 7 with guide rollers 8 engaged with opposite sides of the pedestal. Means such as an upright screw 9 driven through gearing at 10 from the crank 11 raise and lower the carriage.

The side plates 7 project over the base 2 and at their ends have upwardly and outwardly inclined arms 12 secured thereto. Positioned between the upper ends of the arms 12 is a casting generally indicated at 13. The casting has a central cylindrical housing 14 with flanges 15 extending from each side. Pivot screws 16 passed through the arms into the ends of the flanges pivotally support the casting along an axis intersecting the longitudinal axis of the housing. Other screws 17 passed through arcuate slots 18 in the arms and into the ends of the flanges clamp the casting and housing in angularly adjustable position between the arms.

Yoke arms 19 cast integrally with the flanges 15 extend rearwardly to a connecting bight 20. The housing 14 is bored at 21 and the bight has a bearing bore 22 coaxial with the bore 21. A hollow cylindrical slide 23 is recipro- 3,417,949 Patented Dec. 24, 1968 ice cable in the bore 21 and has a shaft 24 rotatably retained in the bearing 22 by a thrust collar 25 and the hub 26 of a hand wheel 27 having handle arms 28. The right end of the shaft 24 is threaded at 29 and engaged with a threaded portion 30 within the end of the slide to reciprocate the slide.

The slide 23 is restrained against rotation by engagement of a pin 31 in one of four longitudinal grooves 32 in the exterior of the slide. The pin is mounted in a boss 33 on top of the housing and spring biased into the groove by a spring 34. Handle 35 on the pin permits retraction of the pin and rotation of the slide in the housing.

Secured to the outer end of the slide and projecting radially therebeyond is a plate 36. The plate 36 is detachably connected by screws 37 to the vertical flange 38 of an angled bracket having a laterally projecting flange 39. Flanges 38 and 39 form a bracket that is sized to be connected to the body 40 of a portable or manually operable, heavy duty, electric drill generally indicated at 41. As appears in FIGURES 2 and 4, screws 42 recessed into the flange 38 engage the end of the body. Heavy duty drills are commonly provided with an auxiliary, pipe-like, handle (not illustrated) that is screwed into a hole 43 in the body, opposite a main hand grip and control handle 44. In mounting the drill on the bracket flange 39, the pipe handle is removed from the drill and a suitably sized insert 45 is screwed into the hole for the pipe to receive a screw 46 that clamps the side of the body to the flange 39. The drill 41 is thus secured with its chuck 47 generally coaxial with the slide 23.

One side arm 12 of the support carriage has a ring 48 or other fastening for one end of a chain 49. The other arm has a releasable connection such as the hook that is selectively connectable to links of the chain.

With the foregoing structure the base 1 may be wheeled to the work and the carriage 6 raised or lowered by the screw 9 to present the bit 51 of the drill to the correct position on a work piece indicated at W. The chain 49 may be looped around the work and engaged with the hook 50 to provide a reaction abutment or anchor and the entire drill may be fed to the work by manipulating the hand wheel 27, 28. Should obstructions alongside of the work interfere with positioning the control handle 43, the slide 23 and the whole drill may be rotated to another position as indicated at 43A in FIGURE 2. By manipulation of the screws 17 in the slots 18, the drill may be adjusted to other angular positions. By feeding the drill with the screw 29, a bore may be completed through the work without the usual over travel or thrust of the bit such as usually occurs when hand drills are pressed manually against the work. Damage to parts behind the work, and injury to the workman and the drill is thus avoided.

What is claimed as new is:

1. A portable drill support comprising a mobile carriage having a vertically adjustable support thereon with a portion projecting laterally from the vertical adjusting. mechanism,

spaced parallel arms secured to the projecting portion of said support and projecting therebeyond,

a slide housing secured between said arms and having a bore formed through the housing generally parallel to the arms with a shaft bearing at one end coaxial with the bore,

a hollow cylindrical slide reciprocable in said bore,

means forming an internal thread within said slide,

a feed shaft rotatably and axially fixed journalled in said bearing and having an adjusting handle on one end,

a screw thread on the other end of said shaft drivingly engaged with said thread in said slide,

longitudinal grooves formed in angularly spaced positions around said slide,

lock means movably mounted on said housing and spring biased toward selective engagement in one of said grooves,

a drill support bracket having angularly disposed flanges connected to the opposite end of said slide from said screw and adapted to support the body of a power drill with the chuck of the drill generally coaxial with said slide,

a chain pivotally connected to one of said arms adjacent said housing,

and means on the other of said arms selectively engageable with links of said chain.

2. A drill support as defined in claim 1 in which said housing has a pivotal connection to said arms along an axis in transverse relation to said bore,

and adjustable connections between said arms and said housing arranged in angularly spaced relation about said pivot axis.

3. A drill support as defined in claim 1 in which said shaft bearing is formed in a yoke extending from the end of said housing,

and said lock means is a pin extending radially through the wall of said housing and spring biased toward said slide.

4. A drill support as defined in claim 1 in which said bracket has a flange adapted to be secured to the side of a power drill and another flange adapted to be secured to the end of a power drill opposite from the chuck of the drill,

a plate secured to the end of said slide and projecting radially beyond the periphery thereof,

and means releasably connecting the projecting portion of said plate to said other flange on said bracket.

References Cited UNITED STATES PATENTS 298,625 5/1884 Saunders 248-13 FRANCIS S. HUSAR, Primary Examiner.

US. Cl. X.R. 

1. A PORTABLE DRILL SUPPORT COMPRISING A MOBILE CARRIAGE HAVING A VERTICALLY ADJUSTABLE SUPPORT THEREON WITH A PORTION PROJECTING LATERALLY FROM THE VERTICAL ADJUSTING MECHANISM, SPACED PARALLEL ARMS SECURED TO THE PROJECTING PORTION OF SAID SUPPORT AND PROJECTING THEREBEYOND, A SLIDE HOUSING SECURED BETWEEN SAID ARMS AND HAVING A BORE FORMED THROUGH THE HOUSING GENERALLY PARALLEL TO THE ARMS WITH A SHAFT BEARING AT ONE END COAXIAL WITH THE BORE, A HOLLOW CYLINDRICAL SLIDE RECIPROCABLE IN SAID BORE, MEANS FORMING AN INTERNAL THREAD WITHIN SAID SLIDE, A FEED SHAFT ROTATABLY AND AXIALLY FIXED JOURNALLED IN SAID BEARING AND HAVING AN ADJUSTING HANDLE ON ONE END, A SCREW THREAD ON THE OTHER END OF SAID SHAFT DRIVINGLY ENGAGED WITH SAID THREAD IN SAID SLIDE, LONGITUDINAL GROOVES IN ANGULARLY SPACED POSITIONS AROUND SAID SLIDE, LOCK MEANS MOVABLE MOUNTED ON SAID HOUSIN AND SPRING BIASED TOWARD SELECTIVE ENGAGEMENT IN ONE OF SAID GROOVES, A DRILL SUPPORT BRACKETS HAVING ANGULARLY DISPOSED FLANGES CONNECTED TO THE OPPOSITE END OF SAID SLIDE FROM SAID SCREW AND ADAPTED TO SUPPORT THE BODY OF A POWER DRILL WITH THE CHUCK OF THE DRILL GENERALLY COAXIAL WITH SAID SLIDE, A CHAIN PIVOTALLY CONNECTED TO ONE OF SAID ARMS ADJACENT SAID HOUSING, AND MEANS ON THE OTHER OF SAID ARMS SELECTIVELY ENGAGEABLE WITH LINKS OF SAID CHAIN. 